WO2024085633A2

WO2024085633A2 - Valve device and medicinal liquid injection apparatus comprising same

Info

Publication number: WO2024085633A2
Application number: PCT/KR2023/016107
Authority: WO
Inventors: 김용현
Original assignee: 김용현
Priority date: 2022-10-20
Filing date: 2023-10-18
Publication date: 2024-04-25

Abstract

A valve device according to a disclosed embodiment may comprise: a valve housing comprising a first cover part in which a first hole is formed, and a second cover part which is connected to a lower portion of the first cover part and in which a second hole is formed; and a diaphragm which is disposed between an inner opening of the first hole and an inner opening of the second hole inside the valve housing, has an opening and closing part configured to close the inner opening of the first hole by contacting an inner surface of the first cover part, and is configured to operate by elastically deforming. The diaphragm may be configured to, in a first inflow state in which a liquid flowing into the valve housing through the first hole presses the diaphragm, open the inner opening of the first hole and communicate the first hole and the second hole with each other by an upper side of the opening and closing part being spaced apart from the inner side of the first cover part and elastically deformed, and in a second inflow state in which a liquid flowing into the valve housing through the second hole presses the diaphragm, close the inner opening of the first hole by the upper side of the opening and closing part contacting the inner surface of the first cover part.

Description

Valve device and chemical injection device including the same

The present disclosure relates to a valve device and a chemical injection device including the same.

In order to supply drugs to a patient, a drug injection device that injects a liquid drug into the patient is known. Using a drug injection device, the drug solution within a predetermined storage space is introduced into the patient's body through a passage connected to the patient (for example, the inner space of a tube and an injection needle).

A conventional chemical injection device includes a chamber capable of storing a chemical solution therein, and a piston that pressurizes the chemical solution stored in the chamber. A hole through which the chemical liquid passes may be formed in the chamber so that the chemical liquid is discharged to the outside of the chamber when the piston pressurizes the chemical liquid. When the chemical liquid is injected into the interior of the chamber through the hole in the chamber, the piston is pushed back as the chemical liquid is filled.

In a conventional chemical injection device, the chemical liquid may be injected into the chamber with the piston previously retracted. However, when the chemical liquid is filled into the chamber, if the gas in the chamber does not escape smoothly to the outside, there may not be enough space in the chemical liquid storage space to fill the chemical liquid, and when the chemical liquid is discharged later, the gas in the chemical liquid storage space may be There is a problem that the flow of the chemical solution is not smooth. An air exhaust hole may be formed in the chamber to discharge the gas in the chamber to the outside of the chemical injection device. However, even in this case, there is a problem that the chemical liquid inside the chamber may leak through the air exhaust hole. One embodiment of the present disclosure solves this problem.

A valve device according to one embodiment includes a valve housing including a first cover part in which a first hole is formed, and a second cover part connected to a lower part of the first cover part and in which a second hole is formed; and an opening and closing part disposed between the inner opening of the first hole and the inner opening of the second hole in the interior of the valve housing, and configured to close the inner opening of the first hole by contacting the inner surface of the first cover part, It may include a diaphragm configured to operate by elastically deforming.

In one embodiment, the diaphragm is configured such that, in a first inflow state in which liquid flowing into the valve housing through the first hole presses the diaphragm, the upper side of the opening and closing portion is separated from the inner side of the first cover portion. It may be configured to open the inner opening of the first hole and communicate the first hole and the second hole with each other by being spaced apart and elastically deformed.

In one embodiment, in the second inflow state in which the liquid flowing into the valve housing through the second hole presses the diaphragm, the upper surface of the opening and closing part contacts the inner surface of the first cover part, thereby causing the second inflow state. 1 It may be configured to close the inner opening of the hole.

In one embodiment, the diaphragm is formed at a position farther than the opening/closing part relative to the inner opening of the first hole, surrounds the inner opening of the first hole, and includes an outer peripheral portion in contact with the inner surface of the valve housing. can do.

In one embodiment, a through hole penetrating the diaphragm is formed in the diaphragm at a position between the opening and closing portion and the outer peripheral portion, and in the first inflow state, a gap is formed between the opening and closing portion and the inner surface of the first cover portion. And the first hole and the second hole may be in communication through the through hole.

In one embodiment, the outer peripheral portion may be configured to contact the inner surface of the first cover portion in a form surrounding the inner opening of the first hole at a position spaced apart from the inner opening of the first hole.

In one embodiment, the outer peripheral portion may be configured to contact the inner surface of the second cover portion in a form surrounding the inner opening of the second hole at a position spaced apart from the inner opening of the second hole.

In one embodiment, the opening and closing portion is formed in the center of the diaphragm and disposed to face the first hole, the outer peripheral portion is formed to surround the opening and closing portion in an annular shape, and the diaphragm extends from the opening and closing portion to the outer peripheral portion, It may include a connection part defining the through hole.

In one embodiment, the upper side of the opening and closing part may have a convex surface toward the first hole.

In one embodiment, the second cover portion includes a groove portion formed to face the opening and closing portion to accommodate at least a portion of the opening and closing portion when the opening and closing portion is spaced apart from the first cover portion, and a lower side of the opening and closing portion has the groove portion. It may have a convex surface towards the wealth.

A chemical liquid injection device according to an embodiment includes a main cylinder forming a chemical liquid receiving space inside which the chemical liquid can be filled; a piston configured to be movable inside the main cylinder so as to change the volume of the chemical solution accommodation space; And it may include the valve device coupled to the main cylinder and configured to regulate communication between the chemical solution receiving space and an external space.

A chemical liquid injection device according to an embodiment has a chemical liquid accommodating space inside which a chemical liquid can be filled, a chemical liquid entrance hole connected to the chemical liquid accommodating space, and a gas generator configured to generate gas, a housing in which a gas generating space for receiving the gas generated and a gas receiving space for receiving gas moving from the gas generating space are formed; a piston configured to separate the chemical accommodating space and the gas accommodating space and to be movable within the housing so that the volume of the chemical accommodating space is reduced by the pressure of the gas in the gas accommodating space; And it may include a switch valve configured to open and close the passage between the gas generating space and the gas receiving space. In the housing, a valve receiving portion is formed with one end open toward the external space so that the switch valve can be inserted, and the switch valve includes a first valve hole communicating with the gas receiving space, the gas generating space, and A valve body having a second valve hole in communication and a third valve hole in communication with the valve accommodating portion, and movably disposed inside the valve body to connect the first valve hole to the second valve hole or the third valve hole. It may include a moving body configured to communicate with a selected one of the three valve holes.

In one embodiment, the movable body is disposed to be movable between a first position and a second position within the valve body, and communicates the first valve hole with the third valve hole when disposed in the first position. configured to block communication with the second valve hole, and when placed in the second position, communicate the first valve hole with the second valve hole but block communication with the third valve hole. It can be configured.

In one embodiment, the valve body includes a cylinder, and the moving body contacts a first portion of the inner wall of the cylinder when in the first position, and a second portion of the inner wall when in the second position. contacting the portion, and the first valve hole may be located between the first portion and the second portion of the inner wall.

In one embodiment, the moving body may include a piston part and a packing part coupled to the piston and in contact with the inner wall.

In one embodiment, the first valve hole is formed at one end of the longitudinal direction of the cylinder, and the piston part may be configured to be at least partially accommodated within the first valve hole and guided along the first valve hole.

In one embodiment, the third valve hole is formed at the other end of the cylinder in the longitudinal direction, and the packing part includes a hole contact part configured to close the third valve hole when the moving object moves to the second position. can do.

In one embodiment, the valve accommodating part is provided in the form of an assembly opening communicating with the external space and a hole extending from the assembly opening in a first direction toward the inside of the housing, and the first part of the valve accommodating part The area perpendicular to the direction may be configured to be constant, continuously, or discontinuously smaller in the first direction.

In one embodiment, the valve body includes a cylinder having a first outer diameter, a flange extending radially from one end of the cylinder to have a second outer diameter larger than the first outer diameter, and an opening formed by the one end of the cylinder. It partially covers the valve and may include a valve cap that defines the third valve hole.

In one embodiment, the valve accommodating part includes an assembly opening communicating with the external space, a first accommodating part extending from the assembling opening into the housing with an area corresponding to the second outer diameter, and the first accommodating part. The accommodating part may include a second accommodating part extending into the interior of the housing with an area corresponding to the first outer diameter.

In one embodiment, an accommodating step is formed between the first accommodating part and the second accommodating part, and may further include an O-ring disposed between the accommodating step and the flange.

The switch valve for a chemical injection device according to an embodiment is configured to be inserted and assembled into the chemical injection device in a predetermined assembly direction, and includes a first valve hole, a second valve hole, and a third valve hole communicating with the external space. The formed valve body is disposed to be movable within the valve body between a first position and a second position located in a direction opposite to the assembly direction from the first position, and the first valve hole is opened at the first position. configured to communicate with the third valve hole but blocked from the second valve hole, and configured to communicate with the first valve hole with the second valve hole but blocked from the third valve hole at the second position. It may include a moving object.

A chemical liquid injection device according to an embodiment includes a housing having a chemical liquid accommodating space in which a chemical liquid can be filled and a gas accommodating space in which a gas can be accommodated, and a chemical liquid entrance hole connected to the chemical liquid accommodating space; a piston configured to separate the chemical accommodation space and the gas accommodation space and to be movable within the housing to change the volume of the chemical liquid accommodation space; And it may include a relief valve configured to open and close the exhaust passage between the gas accommodation space and the external space. The relief valve includes a valve body in which a sensing hole communicating with the gas receiving space and an exhaust hole communicating with the external space are formed, and is movably disposed within the valve body and configured to open and close an inner opening of the sensing hole. and may include a moving body including a sealing member made of an elastic material. The relief valve is configured to communicate the sensing hole with the exhaust hole when the sealing member opens the inner opening of the sensing hole, and the valve body extends along the perimeter of the inner opening of the sensing hole and toward the sealing member. It may include a protruding protrusion, and the sealing member may include a contact portion configured to contact the protrusion and having a flat surface.

In one embodiment, when the sealing member and the protrusion contact the first direction, the thickness of the contact portion in the first direction may be thinner than the thickness of a portion of the sealing member adjacent to the contact portion in the first direction. .

In one embodiment, the movable body includes a support coupled to the sealing member and configured to press the sealing member toward the protrusion, and the surface of the support side of the sealing member is formed at a position corresponding to the contact portion. and an annular groove, and the support may include an annular protrusion engaged with the annular groove.

In one embodiment, the valve body includes a cylinder that accommodates the moving body, and the support moves inside the cylinder along an inner wall of the cylinder, but there is a gap between the inner wall and the outer peripheral surface of the support. It can be configured to do so.

In one embodiment, the relief valve may include an elastic member disposed below the movable body to press the movable body toward the protrusion.

A relief valve for a chemical injection device according to an embodiment includes a valve body including a sensing hole and an exhaust hole; and a moving body movably disposed within the valve body, configured to open and close the inner opening of the sensing hole, and including a sealing member made of an elastic material. When the sealing member opens the inner opening of the sensing hole, the sensing hole and the exhaust hole communicate, and the valve body includes a protrusion extending along the circumference of the inner opening of the sensing hole and protruding toward the sealing member, The sealing member may include a contact portion configured to contact the protrusion and having a flat surface.

According to an embodiment of the present disclosure, a chemical liquid injection device can be provided that has a relatively simple structure and can easily fill the chemical liquid therein.

According to embodiments of the present disclosure, when filling the chemical solution, there is no need to discharge gas in the chemical storage space, so the charging and discharging of the chemical solution can be smooth. In addition, since a separate exhaust hole is not required for discharging the gas in the chemical storage space, the risk of chemical liquid leaking through the corresponding exhaust hole can be avoided.

1 is a perspective view of a chemical injection device according to an embodiment of the present disclosure.

FIG. 2 is a cross-sectional view of the chemical injection device of FIG. 1 taken along line II'.

Figure 3 is an enlarged view of the valve device for chemical injection in the cross-sectional view of Figure 2.

Figure 4 is a partially exploded perspective view of a valve device for chemical injection.

Figure 5 shows the deformation of the diaphragm of the valve device when a chemical solution is injected.

Figure 6 is a perspective view of the diaphragm of the valve device.

Figure 7 shows a switch valve and a relief valve provided in the chemical injection device.

Figure 8 is a top view of the area where the switch valve and relief valve are installed in the chemical injection device.

FIG. 9 is a cross-sectional view of the switch valve cut along line II-II' of FIG. 8, showing a state in which the switch moving body of the switch valve is advanced.

FIG. 10 is a cross-sectional view of the switch valve cut along line II-II' of FIG. 8, showing the switch moving body of the switch valve in a retracted state.

11 is an assembly diagram of the body of the switch valve.

FIG. 12 is a cross-sectional view of the relief valve taken along line III-III' of FIG. 8.

FIG. 13 is an enlarged view of the upper structure of the relief valve in the cross-sectional view of FIG. 12.

Figure 14 is an exploded perspective view of the relief moving body of the relief valve.

Figure 15 shows a state in which the relief moving body of the relief valve is retracted.

FIG. 16 is a perspective view of one aspect of the pressing operation unit shown in FIG. 1.

FIG. 17 is a cross-sectional view taken along line IV-IV' of the pressing operation unit shown in FIG. 16.

Figure 18 is a perspective view of another aspect of the pressing operation unit shown in Figure 16.

FIG. 19 is a cross-sectional view taken along line V-V' of the pressing operation unit shown in FIG. 18.

Embodiments of the present disclosure are illustrated for the purpose of explaining the technical idea of the present disclosure. The scope of rights according to the present disclosure is not limited to the embodiments presented below or the specific description of these embodiments.

All technical terms and scientific terms used in this disclosure, unless otherwise defined, have meanings commonly understood by those skilled in the art to which this disclosure pertains. All terms used in this disclosure are selected for the purpose of more clearly explaining this disclosure and are not selected to limit the scope of rights according to this disclosure.

Expressions such as “comprising,” “comprising,” “having,” and the like used in the present disclosure are open terms that imply the possibility of including other embodiments, unless otherwise stated in the phrase or sentence containing the expression. It should be understood as (open-ended terms).

Singular terms used in this disclosure may include plural terms unless otherwise stated, and this also applies to singular terms used in the claims.

Expressions such as “first” and “second” used in the present disclosure are used to distinguish a plurality of components from each other and do not limit the order or importance of the components.

In this disclosure, when a component is referred to as being “connected” or “connected” to another component, it means that the component can be directly connected or connected to the other component, or as a new component. It should be understood that it can be connected or connected through other components.

Direction indicators such as “upward” and “up” used in the present disclosure are based on the direction in which the valve device is located relative to the piston in the attached drawings, and direction indicators such as “downward” and “down” are based on the opposite direction. means. The chemical injection device shown in the attached drawings may be oriented differently, and the direction indicators may be interpreted accordingly.

Hereinafter, embodiments of the present disclosure will be described with reference to the attached drawings. In the accompanying drawings, identical or corresponding components are given the same reference numerals. Additionally, in the description of the following embodiments, overlapping descriptions of identical or corresponding components may be omitted. However, even if descriptions of components are omitted, it is not intended that such components are not included in any embodiment.

Figure 1 is a perspective view of a chemical injection device 1 according to an embodiment of the present disclosure. FIG. 2 is a cross-sectional view of the chemical injection device 1 of FIG. 1 taken along line II'. Figure 3 is an enlarged view of the valve device 10 for chemical injection in the cross-sectional view of Figure 2. Figure 4 is a partially exploded perspective view of the valve device 10 for chemical injection. Figure 5 shows that the diaphragm 15 of the valve device 10 is deformed when a chemical solution is injected. Figure 6 is a perspective view of the diaphragm 15 of the valve device 10.

Referring to Figures 1 to 3, the chemical injection device 1 includes a main cylinder 31 and a moving body 20 movable inside the main cylinder 31. The moving body includes a piston 21 and a sealing ring 23 coupled to the piston. A sealing ring 23 is disposed between the piston 21 and the inner wall of the main cylinder 31. The main cylinder 31 forms (or defines) a chemical liquid receiving space (S1) inside which the chemical liquid can be filled. As the piston 21 moves inside the main cylinder 31, the volume of the chemical liquid accommodation space S1 changes. For example, when the piston 21 moves downward, the volume of the chemical solution accommodation space (S1) increases, and when it moves upward, the volume of the chemical solution accommodation space (S1) decreases.

The chemical injection device 1 includes a valve device 10 coupled to the main cylinder 31. The valve device 10 is coupled to one end of the main cylinder 31, and the chemical liquid can be injected into the chemical liquid receiving space S1 through the valve device 10. The valve device 10 may include a chemical discharge hole 19 through which the chemical liquid held in the chemical liquid accommodation space S1 can be discharged. As the piston 21 rises, it pushes out the chemical liquid, and the chemical liquid can be discharged through the chemical discharge hole 19.

The valve device 10 is configured to regulate communication between the chemical liquid receiving space S1 and the space outside the chemical liquid injection device 1. The valve device 10 provides a flow path between the outside of the chemical solution injection device 1 and the chemical solution receiving space (S1), and the upper flow path directs the chemical solution from the outside of the chemical solution injection device 1 to the chemical solution receiving space (S1). It is configured to form only in one direction. That is, although the chemical solution can be injected into the chemical solution accommodation space (S1) through the valve device (10), the chemical solution in the chemical solution accommodation space (S1) cannot escape to the outside at least through the valve device (10). For example, the chemical solution can be discharged only through the chemical discharge hole 19.

3 and 4, the valve device 10 includes a valve housing 11 and a diaphragm 15 disposed inside the valve housing 11. The valve housing 11 includes a first cover part 12 in which a first hole 121 is formed, and a second cover part connected to the lower part of the first cover part 12 and in which a second hole 131 is formed. (13) may be included. When the first cover part 12 and the second cover part 13 are assembled together, a space is formed inside, and the diaphragm 15 can be placed in the space.

The second cover part 13 may be coupled to one end of the main cylinder 31, and the first cover part 12 may be coupled to the second cover part 13. A cap 17 for blocking the first hole 121 may be attached to a portion of the first cover portion 12 that defines the first hole 121 . For example, the cap 17 may be coupled to the first cover portion 12 by screwing.

The diaphragm 15 is disposed between the inner opening 121a of the first hole 121 of the first cover part 12 and the inner opening 131a of the second hole 131 of the second cover part 13. You can. The opening and closing portion 151 of the diaphragm 15 is configured to open and close the inner opening 121a of the first hole 121. The opening/closing part 151 closes the inner opening 121a of the first hole 121 by contacting the inner surface 122 of the first cover part 12, and is connected to the inner surface 122 of the first cover part 12. By being spaced apart, the inner opening 121a of the first hole 121 is opened.

The diaphragm 15 is configured to operate by elastically deforming. Referring to Figures 5 and 6, the diaphragm 15 is in a state in which liquid flowing into the valve housing 11 through the first hole 121 presses the diaphragm 15 (hereinafter referred to as 'first inflow state'). '), the inner opening 121a of the first hole 121 is opened by elastic deformation and the first hole 121 and the second hole 131 are configured to communicate with each other. When the chemical solution is injected through the first hole 121 of the first cover part 12, the diaphragm 15 is pressed by the pressure of the chemical solution and is elastically deformed downward. Accordingly, the upper surface 151a of the opening and closing part 151 is spaced apart from the inner surface 122 of the first cover part 12, and the opening and closing part 151 opens the inner opening 121a of the first hole 121. That is, the contact between the inner surface 122 of the first cover part 12 and the opening and closing part 151 is released by the chemical solution flowing through the first hole 121, and the inner surface of the first cover part 12 ( A gap is created between 122) and the upper side 151a of the opening and closing portion 151. The first hole 121 and the second hole 131 may communicate with each other through the above gap.

Referring to FIGS. 5 and 6 , the diaphragm 15 may include a through hole 153 that allows communication between the first hole 121 and the second hole 131 . In the first inflow state, the opening/closing portion 151 of the diaphragm 15 is spaced apart from the inner opening 121a of the first hole 121 and is positioned between the opening/closing portion 151 and the inner opening 121a of the first hole 121. A gap is formed, and the first hole 121 and the second hole 131 communicate with each other through the gap and the through hole 153. In this case, the chemical solution may sequentially flow into the chemical solution receiving space (S1) along the first hole 121, the through hole 153, and the second hole 131. In FIG. 6, two through holes 153 are provided in the diaphragm 15, but in other embodiments, one or three or more through holes 153 may be provided in the diaphragm 15.

Referring to FIG. 3, the diaphragm 15 is in a state (hereinafter referred to as ' In the 'second inflow state'), the upper surface 151a of the opening/closing part 151 contacts the inner surface 122 of the first cover part 12 to close the inner opening 121a of the first hole 121. It is composed. In the second inflow state, the diaphragm 15 closes the inner opening 121a of the first hole 121, and the through hole 153 communicates only with the second hole 131. In this case, since the first hole 121 and the second hole 131 are not in communication with each other, the chemical solution flowing into the valve housing 11 from the second hole 131 does not escape through the first hole 121. No.

Referring to FIG. 5 , the opening/closing portion 151 of the diaphragm 15 may be formed in the central portion of the diaphragm 15 and disposed to face the first hole 121 . The upper side 151a of the opening and closing part 151 may have a convex surface toward the first hole 121.

Referring to FIG. 5, the second cover portion 13 is a groove formed opposite the opening and closing portion 151 to accommodate at least a portion of the opening and closing portion 151 when the opening and closing portion 151 is spaced apart from the first cover portion 12. It may include (133). The lower side 151b of the opening and closing part 151 may have a convex surface toward the groove 133 of the second cover part 13. The groove portion 133 provides a space for the opening and closing portion 151 to move downward in the first inflow state.

Referring to FIG. 6, the diaphragm 15 may include an outer peripheral portion 152 formed to surround the opening and closing portion 151. The diaphragm 15 may include a connection portion 154 extending from the opening/closing portion 151 to the outer peripheral portion 152. The connection portion 154 may define a through hole 153.

Referring to FIG. 5, a protrusion 123 protruding downward may be formed on the inner surface 122 of the first cover part 12. A receiving portion 155 capable of accommodating the protrusion 123 may be formed on the upper side 151a of the opening and closing portion 151 of the diaphragm 15. The protrusion 123 may be provided in a form that seamlessly surrounds the first hole 121. For example, the protrusion 123 may seamlessly surround the first hole 121 in a circular shape. In a state in which no external force acts on the diaphragm 15 or in a second inflow state, the protrusion 123 is accommodated in the receiving portion 155, and can effectively block communication between the first hole 121 and the through hole 153. there is. In the first inflow state, the protrusion 123 exits the receiving portion 155, and the first hole 121 may communicate with the through hole 153 and the second hole 131. In another embodiment, the receiving part 155 may be formed in the first cover part 12, and the protrusion 123 may be formed in the opening and closing part 151 of the diaphragm 15. Meanwhile, in the embodiment of the present disclosure, the protruding portion 123 of the first cover portion 12 and the receiving portion 155 of the diaphragm 15 are not essential components and may be omitted.

Referring to FIG. 5, the outer peripheral portion 152 of the diaphragm 15 contacts the inner surface of the valve housing 11. The outer peripheral portion 152 may be in close contact with the inner surface of the valve housing 11. The outer peripheral part 152 may be in sealing contact with the inner surface 122 of the first cover part 12 and the inner surface 132 of the second cover part 13.

The outer peripheral portion 152 may be formed at a position farther from the opening/closing portion 151 with respect to the inner opening 121a of the first hole 121 and may surround the inner opening 121a of the first hole 121. The outer peripheral portion 152 of the diaphragm 15 surrounds the inner opening 121a of the first hole 121 at a position spaced apart from the inner opening 121a of the first hole 121. ) may be configured to contact the inner surface 122 of the. For example, the outer peripheral portion 152 may be concentric with the first hole 121 and may be formed in an annular shape having a diameter larger than the inner opening 121a of the first hole 121. Accordingly, in the first inflow state, the chemical liquid flowing into the valve housing 11 through the first hole 121 does not leak through the contact area between the outer peripheral part 152 and the first cover part 12, It may flow into the through hole 153 of the diaphragm 15.

The outer peripheral portion 152 may be formed at a position farther from the opening/closing portion 151 with respect to the inner opening 131a of the second hole 131 and may surround the inner opening 131a of the second hole 131. The outer peripheral portion 152 surrounds the inner opening 131a of the second hole 131 at a position spaced apart from the inner opening 131a of the second hole 131, and is formed on the inner surface of the second cover portion 13. (132). For example, the outer peripheral portion 152 may be concentric with the second hole 131 and may be formed in an annular shape having a diameter larger than the inner opening 131a of the second hole 131. Accordingly, in the second inflow state, the chemical liquid flows into the inside of the valve housing 11 through the second hole 131 and does not leak through the contact area between the outer peripheral part 152 and the second cover part 13.

Figure 7 shows the switch valve 60 and relief valve 80 provided in the chemical injection device 1. Figure 8 is a view from above of the area where the switch valve 60 and relief valve 80 are installed in the chemical injection device 1. FIG. 9 is a cross-sectional view of the switch valve 60 taken along line II-II' of FIG. 8, showing the switch moving body 62 of the switch valve 60 in an advanced state. FIG. 10 is a cross-sectional view of the switch valve 60 taken along line II-II' of FIG. 8, showing the switch moving body 62 of the switch valve 60 in a retracted state. Figure 11 is an assembly diagram of the body 33 of the switch valve 60.

Referring to FIG. 2, the chemical injection device 1 includes a housing 30 in which a chemical liquid receiving space (S1) that can be filled with a chemical liquid is formed, and a chemical liquid entrance hole connected to the chemical liquid receiving space (S1) is formed. Includes. For example, the housing 30 may include the main cylinder 31 described in FIGS. 2 to 6 and a valve device 10 coupled to the main cylinder 31. In addition, the chemical liquid entrance hole may be provided by the valve device 10 and the chemical liquid discharge hole 19 described in FIGS. 2 to 6. The housing 30 of the chemical liquid injection device 1 has a gas generator 35 configured to generate gas, and a gas generation space S3 in which the gas generated therefrom is accommodated and a gas generation space S3. A gas accommodation space (S2) in which the moved gas is accommodated may be formed.

Referring to FIG. 2, the chemical injection device 1 includes a moving body 20 that separates the chemical liquid accommodating space S1 and the gas accommodating space S2. The moving body 20 is configured to be movable inside the valve housing 11. That is, the moving body 20 can move along the inner surface of the main cylinder 31. Referring to FIG. 2 together, the piston 21 may move upward due to the pressure of the gas in the gas accommodation space (S2), thereby reducing the volume of the chemical accommodation space (S1). Alternatively, as the chemical solution is filled in the chemical solution accommodation space (S1), the volume of the chemical solution accommodation space (S1) may increase by moving downward.

The chemical injection device 1 may include a switch valve 60 configured to open and close the passage between the gas generating space S3 and the gas receiving space S2.

Referring to FIGS. 2, 7, and 9, the body 33 of the housing 30 of the chemical injection device 1 has one end open toward the external space so that the switch valve 60 can be inserted. A receiving portion 333 may be formed. The valve housing 11 of the chemical liquid injection device 1 includes a body 33 coupled to the lower end of the main cylinder 31, and the body 33 may define the valve receiving portion 333. The switch valve 60 may be inserted into the valve receiving portion 333 formed in the body 33. An opening 334 communicating with the valve receiving portion 333 is formed on the outer peripheral surface of the body 33.

The switch valve 60 includes a switch valve body 61 and a switch moving body 62 movably disposed within the switch valve body 61. The switch valve body 61 includes a first valve hole 611 communicating with the gas receiving space (S2), a second valve hole 612 communicating with the gas generating space (S3), and a valve receiving portion 333. A communicating third valve hole 613 may be formed. The body 33 includes a first communication hole 331 that communicates the first valve hole 611 with the gas receiving space (S2), and a second communication hole that communicates the second valve hole 612 with the gas generating space (S3). It may include a communication hole 332. The third valve hole 613 communicates with the outside of the chemical injection device 1.

The switch valve body 61 includes a hollow switch cylinder 614, and the switch moving body 62 can move forward or backward along the inner wall 615 of the switch cylinder 614. 9 and 10, the switch moving body 62 is between the forward state (or first position) and the retreat state (or second position) inside the switch valve body 61. is arranged to be movable.

The switch moving body 62 includes a piston portion 63 and a packing portion 64 coupled to the piston portion 63. The cylinder contact part 641 of the packing part 64 contacts the inner wall 615 of the switch valve body 61 to divide the space inside the switch cylinder 614 into two airtightly separated

spaces

65 and 66. It can be separated.

The switch moving body 62 may be configured to communicate with the first valve hole 611 selected from the second valve hole 612 or the third valve hole 613 while moving inside the switch valve body 61. .

The switch moving body 62 contacts the first portion 615a of the inner wall 615 of the switch cylinder 614 when in the forward state, and the second portion 615b of the inner wall 615 when in the retracted state. contact. The first valve hole 611 is located between the first part 615a and the second part 615b of the inner wall 615.

Referring to FIG. 9, when the switch moving body 62 is in the forward state, the first valve hole 611 communicates with the third valve hole 613 but blocks communication with the second valve hole 612. . Accordingly, an air flow path (AP1) connecting the gas receiving space (S2) and the outside is formed. Referring to FIG. 2 together, the moving body 20 descends as the chemical liquid is injected into the chemical liquid receiving space (S1), and accordingly, the gas in the gas receiving space (S2) sequentially flows into the first communication hole 331 and the first communication hole 331. It can be exhausted through the first valve hole 611 and the third valve hole 613.

Referring to FIG. 10, when the switch moving body 62 is in a retracted state, the first valve hole 611 communicates with the second valve hole 612 but blocks communication with the third valve hole 613. . Accordingly, an air flow path (AP2) connecting the gas receiving space (S2) and the gas generating space (S3) is formed. When gas is generated inside the gas generation space (S3) and the pressure in the gas generation space (S3) increases, the switch moving body 62 moves from the forward state to the backward state, and accordingly, the gas in the gas generation space (S3) is, Sequentially, it may flow into the gas receiving space (S2) through the second communication hole 332, the second valve hole 612, and the first valve hole 611. Referring to FIG. 2 together, the pressure of the gas receiving space S2 increases due to the gas flowing into the gas receiving space S2, which causes the moving body 20 to rise, thereby discharging the chemical liquid to the outside. Since the switch moving body 62 is in airtight contact with the inner wall 615 of the switch valve body 61, high-pressure gas flowing into the switch valve body 61 through the second valve hole 612 is transmitted to the third valve. It does not leak out of the chemical injection device (1) through the hole (613). In addition, airtightness between the switch valve body 61 and the body 33 is maintained due to the O-ring disposed between the switch valve body 61 and the body 33, which is in the gas generation space S3. It is possible to prevent or minimize the leakage of gas into spaces other than the gas accommodation space (S2) (i.e., to the outside).

The internal space of the switch valve body 61 may be divided into a first space 65 and a second space 66 by the cylinder contact portion 641 of the packing portion 64 of the switch moving body 62. Referring to FIGS. 9 and 10 , the first space 65 communicates with the second valve hole 612 and the second space 66 communicates with the third valve hole 613. The first space 65 is connected to the gas generation space S3 through the second valve hole 612 and the second communication hole 332.

High-pressure gas is generated in the gas generation space S3, and in this case, the first space 65 is exposed to the high-pressure gas. The second space 66 is a space that communicates with the outside through the third valve hole 613, and is exposed to lower pressure than the first space 65. Accordingly, in the present disclosure, the first space 65 may be referred to as a high pressure section and the second space 66 may be referred to as a low pressure section.

The switch valve 60 may include an elastic member 67 disposed below the switch movable body 62 to press the switch movable body 62 toward the second valve hole 612. The elastic member 67 may be, for example, a coil spring. Referring to FIG. 9, the elastic member 67 presses the switch moving body 62 to the left (or toward the second valve hole 612). If the force of the gas in the gas generation space (S3) pushing the switch movable body 62 to the right is not greater than the force of the elastic member 67 pushing the switch movable body 62 to the left, the switch movable body 62 is in the forward state. Then, the first valve hole 611 and the third valve hole 613 communicate with each other. Referring to FIG. 10, when the force of the gas in the gas generation space (S3) pushing the switch movable body 62 to the right is greater than the force of the elastic member 67 pushing the switch movable body 62 to the left, the elastic member ( As 67) is compressed, the switch moving body 62 moves in a retracted state, and the second valve hole 612 and the third valve hole 613 communicate with each other. When the pressure in the gas generation space S3 decreases in the state of FIG. 10, the elastic member 67 is restored and the switch movable body 62 moves forward, and the switch movable body 62 can return to the state of FIG. 9.

The first valve hole 611 is formed at one end in the longitudinal direction of the switch cylinder 614, and the piston portion 63 is at least partially accommodated inside the first valve hole 611 and flows along the first valve hole 611. It can be configured to be guided. For example, a guide rod 631 accommodated in the first hole 121 may be formed at the end of the piston unit 63 on the side of the first hole 121.

The packing part 64 may include a hole contact part 642 configured to close the third valve hole 613 when the switch moving body 62 moves to the retracted state. In the retracted state of the switch movable body 62, even if some of the gas escapes through the gap between the cylinder contact portion 641 and the inner wall 615 of the switch cylinder 614, the hole contact portion provided at the rear of the switch movable body 62 (642) blocks the third valve hole (613) to more effectively prevent gas from leaking.

A second valve hole 612 may be formed at one end of the switch cylinder 614, and a third valve hole 613 may be formed at the other end in the longitudinal direction of the switch cylinder 614. The switch valve body 61 may include a valve cap 618 that partially covers the opening 614a formed by one end of the switch cylinder 614 and defines the third valve hole 613.

Referring to FIG. 11, the valve accommodating portion 333 has an assembly opening 334 in communication with the external space and a first direction from the assembly opening 334 toward the inside of the valve housing 11 (arrow in FIG. 11). direction) may be provided in the form of a hole extending in one direction. The area of the valve receiving portion 333 in a direction perpendicular to the first direction may be constant, continuously, or discontinuously reduced in the first direction. As the valve receiving portion 333 is provided in the above form, the switch valve 60 can be assembled to the body 33 in the first direction.

The first direction in which the switch valve 60 is assembled to the body 33 may coincide with the direction from the second space 66 to the first space 65. That is, when assembling the switch valve 60 in the first direction toward the body 33, the first space 65 corresponding to the high pressure part is located ahead of the second space 66 corresponding to the low pressure part in the first direction. do.

The first direction in which the switch valve 60 is assembled to the body 33 may coincide with the direction in which the second valve hole 612 in the switch valve 60 is opened. For example, the extension portion 619 of the switch valve body 61 defining the second valve hole 612 may extend from the switch cylinder 614 in the first direction.

The switch moving body 62 moves a predetermined distance from the forward state and in the direction opposite to the assembly direction (i.e., the first direction) so that the elastic member 67 is compressed (or the elastic member 67 provides a restoring force). ) It is arranged to be able to move between retreat states. That is, in the switch valve 60, the elastic member 67 is arranged to push the switch moving body 62 in a direction consistent with the assembly direction.

By setting the assembly direction of the switch valve 60 as described above, high sealing performance can be provided. Referring to FIG. 10, the air passage AP2 in the retracted state is a passage through which high-pressure gas passes, so a high level of sealing is required. In the chemical injection device 1 of the present disclosure, the body 33 is integrally formed by injection, thereby minimizing the leakage of high-pressure gas introduced through the second communication hole 332 into channels other than the air flow path AP2. It can be done or prevented.

Referring to FIG. 11, the switch valve body 61 includes a switch cylinder 614 having a first outer diameter D1, and a second outer diameter D2 larger than the first outer diameter D1 at one end of the switch cylinder 614. It may include a flange 617 extending radially to have. The valve accommodating portion 333 has an assembly opening 334 communicating with the external space and a first accommodating body extending from the assembly opening 334 into the body 33 with an area corresponding to the second outer diameter D2. It may include a portion 333a and a second accommodating portion 333b extending from the first accommodating portion 333a into the body 33 with an area corresponding to the first outer diameter D1. For example, the first receiving portion 333a is defined by a cylindrical inner peripheral surface having a second inner diameter (Φ2) corresponding to the second outer diameter (D2), and the second receiving portion (333b) has a first outer diameter (D1). It can be defined by a cylindrical inner peripheral surface having a first inner diameter (Φ1) corresponding to .

The switch valve body 61 defines a second valve hole 612 and may include an extension portion 619 extending from one end of the switch cylinder 614. The extension 619 is provided in the form of a cylinder having a third outer diameter D3, which may be smaller than the second outer diameter D2. The valve accommodating portion 333 may include a third accommodating portion 333c that accommodates the extension portion 619 of the switch valve body 61. The third accommodating part 333c communicates with the second accommodating part 333b and may extend from the second accommodating part 333b to an area corresponding to the third outer diameter D3. For example, the third receiving portion 333c may be defined by a cylindrical inner peripheral surface having a third inner diameter (Φ3) corresponding to a third outer diameter (D3).

Referring to FIG. 11, a receiving portion step (S) is formed between the first receiving portion (333a) and the second receiving portion (333b), and the receiving portion step (S) and the flange 617 of the switch valve 60 An O-ring may be placed between them. The O-ring prevents gas from leaking through the gap between the receiving portion 333 and the switch valve 60.

FIG. 12 is a cross-sectional view of the relief valve 80 taken along line III-III' of FIG. 8. FIG. 13 is an enlarged view of the upper structure of the relief valve 80 in the cross-sectional view of FIG. 12. Figure 14 is an exploded perspective view of the relief moving body 82 of the relief valve 80. FIG. 15 shows a state in which the relief moving body 82 of the relief valve 80 is retracted.

The chemical injection device 1 may include a relief valve 80 configured to open and close the exhaust passage between the gas accommodation space S2 and the external space. The relief valve 80 may be coupled to the body 33.

Referring to FIG. 12, the relief valve 80 includes a relief valve body 81 and a relief moving body 82 movably disposed within the relief valve body 81. A sensing hole 811 communicating with the gas receiving space S2 and an exhaust hole 813 communicating with an external space are formed in the relief valve body 81. The body 33 may define an exhaust flow path 335 that communicates the exhaust hole 813 with the outside (S4).

Referring to FIG. 13, the relief moving body 82 is configured to open and close the inner opening of the sensing hole 811 and is provided with a sealing member 83 made of an elastic material. An elastic member 85 is disposed below the relief movable body 82, and the elastic member supports the relief movable body 82 and presses it toward the inner opening of the sensing hole 811. When the relief moving body 82 is brought into close contact with the upper side by the elastic member 85, the inner opening of the sensing hole 811 is closed.

Referring to FIG. 15, the relief valve 80 is configured to communicate the sensing hole 811 with the exhaust hole 813 when the sealing member 83 opens the inner opening of the sensing hole 811. When the pressure of the gas receiving space S2 in communication with the sensing hole 811 becomes higher than a certain value, the relief moving body 82 retreats and the sealing member 83 is spaced from the inner opening of the sensing hole 811. In this case, the gas in the gas receiving space S2 may be exhausted through the gap formed between the sealing member 83 and the inner opening of the sensing hole 811. Through the action of this relief valve 80, the pressure within the gas receiving space S2 can be prevented from exceeding a specific value.

The relief valve body 81 extends along the perimeter of the inner opening of the sensing hole 811 and includes a protrusion 815 protruding toward the sealing member 83. The protrusion 815 may extend annularly concentrically with the sensing hole 811. For example, referring to Figure 13, the protrusion 815 defines the lower part of the sensing hole 811, but has an inner tapered surface 817 that radiates downward and an outer surface that extends outward and upward from the inner tapered surface 817. It may be defined by a tapered surface 818.

The sealing member 83 includes a contact portion 831 configured to contact the protrusion 815. The contact portion 831 has a flat surface. For example, referring to FIGS. 13 and 14, the portion of the sealing member 83 that contacts the lower end of the protrusion 815 in the vertical direction has a horizontal surface, and this portion can be defined as the contact portion 831. there is. If the contact portion 831 is not flat and is provided in a form that protrudes upward, it may be difficult to maintain a seal between the contact portion 831 and the inner opening of the sensing hole 811. Since the sealing member 83 is made of an elastic material such as rubber or silicon, it is difficult to make it into a protruding shape with a uniform height, and thus it is difficult for the contact portion 831 to airtightly close the inner opening of the sensing hole 811. Because. On the other hand, in the present disclosure, the contact portion 831 is flat and the shape of the opening where the contact portion 831 opens and closes is configured to protrude toward the contact portion 831. That is, the relief valve body 81 is provided with a protrusion 815 that contacts the contact part 831. The protrusion 815 is a part of the relief valve body 81 and is made of a relatively hard material (e.g., plastic) compared to the elastic material, so it is easy to make the protrusion height uniform by applying the sealing member 83. That is, the contact portion 831 of the sealing member 83 is formed flat and the protrusion 815 of the relief valve body 81 is in contact with the contact portion 831, so that the sealing member 83 has a sensing hole ( 811), the confidentiality performance provided is improved.

13 and 14, the upper central portion 832 of the sealing member 83 is provided in a dome shape that is partially accommodated inside the sensing hole 811 when the contact portion 831 contacts the protruding portion 815. It can be.

Referring to FIG. 13, when the sealing member 83 and the protrusion 815 contact in the first direction (or vertical direction), the thickness t1 of the contact portion 831 in the first direction is the thickness t1 of the sealing member 83. It is thinner than the thickness t2 of the portion adjacent to the contact portion 831 in the first direction. For example, the contact portion 831 of the sealing member 83 contacts the protrusion 815 in the vertical direction, and the thickness t1 of the contact portion 831 in the vertical direction is thinner than the thickness t2 of the peripheral portion. Since the sealing member 83 is made of an elastic material, the thicker it is, the greater the amount of deformation due to external force in the thickness direction. However, as the change in thickness increases, it is difficult to achieve excellent sealing over the entire contact area between the sealing member 83 and the protrusion 815. In the relief valve 80 of the present disclosure, the vertical thickness of the contact portion 831 of the sealing member 83 is formed to be thinner than the surrounding portion, and the amount of change in the thickness of the contact portion 831 when contacting the protrusion 815 is relatively It can be kept small. Accordingly, excellent sealing can be achieved throughout the contact area between the sealing member 83 and the protrusion 815.

Referring to FIGS. 13 and 14 , the relief moving body 82 includes a support 84 coupled to the sealing member 83 and configured to press the sealing member 83 toward the protrusion 815 . The surface of the sealing member 83 on the support 84 side includes an annular groove 833 formed at a position corresponding to the contact portion 831. Support 84 includes an annular protrusion 841 that engages an annular groove 833.

The relief valve body 81 includes a relief cylinder 819 that accommodates the relief moving body 82. The support 84 moves inside the relief cylinder 819 along the inner wall 819a of the relief cylinder 819, and there is a gap (g) between the inner wall 819a and the outer peripheral surface 842 of the support 84. This exists. Therefore, when the sealing member 83 opens the inner opening of the sensing hole 811, the gas flowing through the sensing hole 811 flows through the gap g between the relief moving body 82 and the relief cylinder 819. can be exhausted.

The relief valve 80 may include an elastic member 85 disposed below the relief movable body 82 to press the relief movable body 82 toward the protrusion 815. The elastic member 85 may be, for example, a coil spring.

Meanwhile, the chemical injection device including the switch valve 60 of the present disclosure is not limited to the chemical injection device 1 including the valve device 10 described in FIGS. 2 to 6. In addition, the chemical injection device including the relief valve 80 of the present disclosure is not limited to the chemical injection device 1 including the valve device 10 described in FIGS. 2 to 6. In addition, the embodiment of the present disclosure is not limited to the chemical injection device 1 including the switch valve 60 and/or the relief valve 80, and the switch valve 60 is used in the chemical injection device 1 according to another embodiment. ) and relief valve 80 may be omitted.

FIG. 16 is a perspective view of one aspect of the pressing operation unit 50 shown in FIG. 1, and FIG. 17 is a cross-sectional view taken along line IV-IV' of the pressing operation unit 50 shown in FIG. 16.

Referring to FIGS. 16 and 17 , the rotating part 53 of the pressing operation unit 50 may be configured to rotate with respect to the receptacle 51 . For example, the rotating part 53 may be rotatably coupled to the lower receptacle housing 512 of the receptacle 51. The pressing unit 54 of the pressing operation unit 50 may be configured to be pressed and moved in an upward direction (hereinafter referred to as first direction A1), which is a direction closer to the receptacle 51, according to the rotation of the rotating unit 53. . The pressing unit 54 may be configured to release the isolation of the partition wall unit 52 by pressing the receptacle 51 by moving in the first direction A1. The pressing portion 54 can cause the partition wall portion 52 to be released from the closed position by pressing the receptacle 51 .

The rotation unit 53 may rotate with respect to the receptacle 51 using an upward axis, that is, an axis parallel to the first direction A1, as a rotation axis. As an example, the rotation unit 53 uses an axis (virtual axis) parallel to the first direction A1 as a rotation axis, and the first rotation direction R1 and the first rotation direction R1 shown in FIG. 16 It can rotate along the second rotation direction (R2), which is the opposite direction. Here, the first rotation direction R1 and the second rotation direction R2 are directions presented for convenience of explanation of the rotation direction of the rotation part 53.

When the user needs to use the chemical injection device 1 (see FIG. 1), the user can rotate the rotary part 53 with respect to the receptacle 51 while holding parts other than the rotary part 53. The user may rotate the rotating unit 53 along the first rotational direction (R1) or the second rotational direction (R2). Accordingly, the rotating part 53 rotates with respect to the receptacle 51, and the pressing part 54 can move in the first direction A1 according to the rotation of the rotating part 53.

The pressing unit 54 may include a plate unit 542 disposed inside the rotating unit 53 and configured to press the receptacle 51 . The plate portion 542 may have a substantially disk shape. The pressing portion 54 may include a convex portion 543 that protrudes convexly in the first direction A1 and is configured to press a predetermined portion of the receptacle 51 . The convex portion 543 may protrude convexly from the plate portion 542 toward the first direction A1, that is, an upward direction closer to the receptacle 51. The convex portion 543 may press the receptacle 51 when the pressing portion 54 approaches the receptacle 51 . In this embodiment, the pressing unit 54 is configured to press the receptacle 51 by moving from a state spaced apart from the receptacle 51 in a direction closer to the receptacle 51. However, in another embodiment not shown, the pressing unit ( 54) may be configured to press the receptacle 51 by moving from a state already in contact with the receptacle 51 in a direction approaching the receptacle 51. The convex portion 543 can concentrate the pressure applied to the receptacle 51 to a predetermined portion.

The pressing part 54 may include at least one protrusion 541 that contacts the rotating part 53. The protrusion 541 may extend from the plate portion 542 in an outward direction. As shown in FIG. 16 , at least one protrusion 541 may be a plurality of protrusions 541 spaced apart from each other along the outer circumference of the plate portion 542 . The plurality of protrusions 541 may be arranged at the same height with respect to the plate portion 542 and spaced apart from each other at equal intervals. In this embodiment, three protrusions 541 are provided, but the number of protrusions 541 is not limited thereto.

The receptacle 51 may include an insertion groove 516 into which the protrusion 541 is inserted. The insertion groove 516 may be formed in the lower receptacle housing 512 of the receptacle 51 . The protrusion 541 extending outwardly from the plate portion 542 may pass through the insertion groove 516 formed in the lower receptacle housing 512 from the inside to the outside. The insertion groove 516 may extend in the first direction A1. The insertion groove 516 extending in the first direction A1 may guide the movement of the protrusion 541 in the first direction A1. The insertion groove 516 may limit movement in the horizontal direction across the first direction A1. The horizontal width of the insertion groove 516 may be a size corresponding to the horizontal width of the protrusion 541 so that the protrusion 541 can be inserted but prevent the protrusion 541 from moving in the horizontal direction.

The rotating part 53 includes at least one guide part 531. At least one guide unit 531 may be plural. At least one guide part 531 may be formed along the inner surface of the rotating part 53. At least one guide part 531 may be in contact with the pressing part 54. At least one guide portion 531 may contact the protrusion 541 . At least one guide part 531 may include a first inclined surface 532a whose height in the first direction A1 is lowered along the first rotation direction R1 of the rotating part 53. The height of the first inclined surface 532a in the first direction A1 may increase along the second rotation direction R2, which is opposite to the first rotation direction R1.

In addition, at least one guide part 531 has a second inclined surface 532b whose height in the first direction A1 is lowered along the second rotation direction R2, which is opposite to the first rotation direction R1. ) may include. The second inclined surface 532b may increase in height in the first direction A1 along the first rotation direction R1.

In the pre-operation state shown in FIGS. 16 and 17, when the user rotates the rotating part 53 in the first rotation direction R1, the protrusion 541 of the pressing part 54 moves toward the first inclined surface 532a. You can slide along. In the pre-operation state, when the user rotates the rotating part 53 in the second rotation direction R2, the protruding part 541 of the pressing part 54 may slide along the second inclined surface 532b. Another aspect of the pressing operation unit 50 as the user rotates the rotation unit 53 in the first rotation direction R1 or the second rotation direction R2 is shown in FIGS. 18 and 19.

FIG. 18 is a perspective view of the pressing operation unit 50 shown in FIG. 16 in another aspect, and FIG. 19 is a cross-sectional view taken along line V-V' of the pressing operation unit 50 shown in FIG. 18.

Referring to FIGS. 18 and 19 , as the rotation unit 53 rotates in the first rotation direction R1, at least one guide unit 531 also rotates in the first rotation direction R1. When at least one guide part 531 rotates along the first rotation direction R1, the first inclined surface 532a also rotates in the first rotation direction R1. When the first inclined surface 532a rotates in the first rotation direction R1, the height of the first inclined surface 532a along which the pressing part 54 slides increases in the first direction A1. Accordingly, the pressing unit 54 may move in the first direction A1 to press the receptacle 51. The pressing part 54 may be configured to move in the first direction A1 by sliding along the first inclined surface 532a of the at least one guide part 531. Here, the protruding portion 541 of the pressing portion 54 may slide along the first inclined surface 532a of the at least one guide portion 531. The protrusion 541 may slide along the first inclined surface 532a while being inserted into the insertion groove 516. As the insertion groove 516 limits movement in the horizontal direction, the protrusion 541 cannot rotate in the first rotation direction R1 along the first inclined surface 532a, but in the first direction A1. You can only move. As the protrusion 541 moves in the first direction A1, the plate portion 542 and the convex portion 543 may also move in the first direction A1.

As the rotation part 53 rotates in the second rotation direction R2, at least one guide part 531 also rotates in the second rotation direction R2. When at least one guide part 531 rotates along the second rotation direction R2, the second inclined surface 532b also rotates in the second rotation direction R2. When the second inclined surface 532b rotates in the second rotation direction R2, the height of the second inclined surface 532b along which the pressing part 54 slides increases in the first direction A1. Accordingly, the pressing unit 54 may move in the first direction A1 to press the receptacle 51. The pressing part 54 may be configured to move in the first direction A1 by sliding along the second inclined surface 532b of the at least one guide part 531. Substantially the same as described above, the protrusion 541 may slide along the second inclined surface 532b while being inserted into the insertion groove 516. At this time, the protrusion 541 cannot rotate in the second rotation direction (R2) and can only move in the first direction (A1).

The rotation unit 53 moves the pressing unit 54 in the first direction A1 both when rotating in the first rotation direction (R1) and when rotating in the second rotation direction (R2). It can be configured. Accordingly, regardless of the direction in which the user rotates the rotating unit 53, the pressing unit 54 can move in the first direction A1. That is, the user can rotate the rotating part 53 in any one direction without distinguishing between the first rotating direction (R1) and the second rotating direction (R2), and accordingly, the pressing part 54 is a receptacle. (51) can be approached. Here, the convex portion 543 of the pressing portion 54 can press a predetermined portion of the receptacle 51, and as the convex portion 543 presses a predetermined portion of the receptacle 51, the partition wall portion 52 Quarantine may be lifted.

The user can rotate the rotating part 53 to more easily and reliably release the isolation of the partition wall part 52. In addition, regardless of the rotation direction of the rotating part 53, the isolation of the partition wall part 52 can be released, thereby increasing the user's convenience when using the chemical injection device 1. Therefore, the chemical injection device 1 can be used more efficiently.

Although the technical idea of the present disclosure has been described through some embodiments and examples shown in the accompanying drawings, it does not go beyond the technical idea and scope of the present disclosure that can be understood by a person skilled in the art to which the present disclosure pertains. It should be noted that various substitutions, modifications and changes may be made within the scope. Furthermore, such substitutions, modifications and alterations are intended to fall within the scope of the appended claims.

Claims

A valve housing including a first cover part in which a first hole is formed, and a second cover part connected to a lower part of the first cover part and in which a second hole is formed; and

It has an opening and closing part disposed between the inner opening of the first hole and the inner opening of the second hole in the interior of the valve housing and configured to close the inner opening of the first hole by contacting the inner surface of the first cover part, and having an elastic elasticity. a diaphragm configured to operate by deforming;

The diaphragm is,

In a first inflow state in which liquid flowing into the valve housing through the first hole presses the diaphragm, the upper surface of the opening and closing part is spaced apart from the inner surface of the first cover part and elastically deforms the first hole. configured to open the inner opening and communicate the first hole and the second hole with each other,

In a second inflow state in which liquid flowing into the valve housing through the second hole presses the diaphragm, the upper surface of the opening and closing part contacts the inner surface of the first cover part to open the inner opening of the first hole. configured to close,

valve device.
In paragraph 1:

The diaphragm is,

An outer peripheral portion is formed at a position farther than the opening and closing portion relative to the inner opening of the first hole, surrounds the inner opening of the first hole, and contacts the inner surface of the valve housing,

A through hole penetrating the diaphragm is formed in the diaphragm at a position between the opening and closing portion and the outer peripheral portion,

In the first inflow state, the first hole and the second hole communicate through the gap between the opening and closing part and the inner surface of the first cover part and the through hole,

valve device.
In paragraph 2,

The outer peripheral portion is configured to contact the inner surface of the first cover portion in a form surrounding the inner opening of the first hole at a position spaced apart from the inner opening of the first hole,

valve device.
In paragraph 3,

The outer peripheral portion is configured to contact the inner surface of the second cover portion in a form surrounding the inner opening of the second hole at a position spaced apart from the inner opening of the second hole,

valve device.
In paragraph 2,

The opening and closing portion is formed in a central portion of the diaphragm and is disposed opposite to the first hole, and the outer peripheral portion is formed to surround the opening and closing portion in an annular shape,

The diaphragm extends from the opening/closing portion to the outer peripheral portion and includes a connection portion defining the through hole.

valve device.
In paragraph 5,

The upper side of the opening and closing portion has a convex surface toward the first hole,

valve device.
In paragraph 1:

The second cover portion includes a groove formed opposite the opening and closing portion to accommodate at least a portion of the opening and closing portion when the opening and closing portion is spaced apart from the first cover portion,

valve device.
In paragraph 7:

The lower side of the opening and closing portion has a convex surface toward the groove,

valve device.
a main cylinder forming a chemical solution receiving space inside which the chemical solution can be filled;

a piston configured to be movable inside the main cylinder so as to change the volume of the chemical solution accommodation space; and

A valve device coupled to the main cylinder and configured to regulate communication between the chemical solution receiving space and an external space,

The valve device is,

A valve housing including a first cover part formed with a first hole communicating with the external space, and a second cover part connected to a lower part of the first cover part and formed with a second hole communicating with the chemical solution receiving space; and

It has an opening and closing part disposed between the inner opening of the first hole and the inner opening of the second hole in the interior of the valve housing and configured to close the inner opening of the first hole by contacting the inner surface of the first cover part, and having an elastic elasticity. a diaphragm configured to operate by deforming;

The diaphragm is,

In a first inflow state in which liquid flowing into the valve housing through the first hole presses the diaphragm, the opening and closing portion is spaced apart from the inner surface of the first cover portion and elastically deforms to open the inner opening of the first hole. configured to open and communicate the first hole and the second hole with each other,

In a second inflow state in which liquid flowing into the valve housing through the second hole presses the diaphragm, the opening and closing portion is configured to close the inner opening of the first hole by contacting the inner surface of the first cover portion. felled,

Chemical injection device.
In paragraph 9:

The diaphragm is,

An outer peripheral portion is formed at a position farther than the opening and closing portion relative to the inner opening of the first hole, surrounds the inner opening of the first hole, and contacts the inner surface of the valve housing,

A through hole penetrating the diaphragm is formed in the diaphragm at a position between the opening and closing portion and the outer peripheral portion,

In the first inflow state, the first hole and the second hole communicate through the gap between the opening and closing part and the inner surface of the first cover part and the through hole,

Chemical injection device.
In paragraph 10:

The outer peripheral portion is configured to contact the inner surface of the first cover portion in a form surrounding the inner opening of the first hole at a position spaced apart from the inner opening of the first hole, and is spaced apart from the inner opening of the second hole. Configured to contact the inner surface of the second cover portion in a form surrounding the inner opening of the second hole at the position,

Chemical injection device.
In paragraph 10:

The opening and closing portion is formed in a central portion of the diaphragm and is disposed opposite to the first hole, and the outer peripheral portion is formed to surround the opening and closing portion in an annular shape,

The diaphragm extends from the opening/closing portion to the outer peripheral portion and includes a connection portion defining the through hole.

Chemical injection device.
In paragraph 9:

The second cover portion includes a groove formed opposite the opening and closing portion to accommodate at least a portion of the opening and closing portion when the opening and closing portion is spaced apart from the first cover portion,

Chemical injection device.